Code result
P04EE
EVAP System Very Small Leak Detected Fuel Tank Side
Moderate severity
What it means
Same as P04EA but at the most sensitive leak threshold - typically the OBD-II 0.020-inch (~0.5 mm) test. The system holds pressure for some time but loses it slower than the diagnostic limit allows; usually fuel cap O-ring fatigue or microcracks in a hose.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Fuel cap O-ring aged or stiffened
highOne of the most commonly reported causes for this code — check this first.
Related help
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